Table 1.

The acquired equivalence paradigm. During training stage 1, participants learn the first two associations between different faces (A1, B1) and fishes (X1, Y1). During training stage 2, different faces (A2, B2) are associated with the same fish, whereas during stage 3, new fishes (X2, Y2) are added. During the test phase, participants are tested on retention of the associations learned in training stages 1–3, and also on generalization to new pairings of faces and fishes (i. e., A2 → X2, B2 → Y2). Retention and generalization pairs were interleaved randomly during the test phase.